| 摘要 |
PURPOSE:To prevent production of toxic gas by which an adverse influence is exercised on storage foods and to effect the safe and accurate feed of fuel by providing a storage chamber, solid fuel, a combustion furnace, a blower, an adsorber to adsorb carbon dioxide gas, a temperature detecting means, a fuel amount detecting means, and a fuel feed device. CONSTITUTION:In a storage chamber 15, first, N2 is 79% and O2 is 21%. With a carbon dioxide gas generating device 22 operated, air in the chamber is introduced to a combustion chamber 27 through a chamber 61 and a switching valve 56 by means of an introduction pipe 25 with the aid of a blower 29. The air is heated by a heater 36 for ignition and is fed for combustion of solid fuel 34. Combustion gas produces CO2 and N2, and after CO2 and N2 are cooled by a cooler 28, they enters an absorber 37 through a switching valve 43 and an introduction pipe 39 by means of a coupling pipe 26. In the absorber, CO2 is absorbed and only N2 is circulated to a storage chamber 15 through a discharge pipe 41 and a switching valve 44 by means of a discharge pipe 55. In order to prevent malfunction of a remaining amount sensor 74 for the solid fuel 34 in the combustion furnace 27 due to an oxidation film, temperature in the combustion chamber 27 is detected by a temperature detecting means 75 to actuate a fuel feed device 24. |
